There are still major deal breakers, like missing synchronization between apps, Xwayland and the compositor, and there’s plenty of missing or broken features for Wayland compositors. The situation is steadily improving, but it will still be a while before you can make the assumption that there will generally be no major issues for most people.

With Nvidia getting more into data centers as their focus, I figure Linux has to be a focus, no?

Sure, but only in regard to data center features. Things like having a smooth desktop experience are not relevant for that, so they only get limited attention.